Analysis of the proportion of valves in the output value of machinery industry

Valves occupy a considerable proportion in mechanical products. According to statistics of foreign industrial countries, the output value of the valve is the sum of compressor, fan and pump, accounting for 5% of the total output value of the entire machinery industry. At the same time, as an important part of major technical equipment, especially in the power, petrochemical, metallurgy, urban water supply and drainage systems, valves play a key role, and they are used in large quantities.

Due to the requirement of adapting to various working conditions, valves are widely used in various fields of national economy and people's livelihood.

The 200X pressure reducing valve is a water supply system used in conjunction with fire fighting water and domestic water for regulating the direction of water supply. When a fire occurs, the firefighting urgently needs a large amount of water, immediately cuts off the domestic water, and ensures sufficient firefighting water. When the water pressure of the firefighting stops decreasing, the valve opens automatically and is in a normally open state, restoring the living water supply. The valve eliminates the need for a separate fire-fighting separate water supply network, which greatly reduces construction costs and water consumption. Valve control has high sensitivity, safety and reliability, easy commissioning and long service life.

The 200X pressure reducing valve thus has a great variety of it. The country’s valve manufacturing industry is very large. There are thousands of valve manufacturers and it is popular all over the country. At present, China has become one of the countries with the largest valve output and market demand in the world.

However, most of the domestic valve industries are small and medium-sized enterprises, with 300X slow closing check valves, and fewer than 10 annual production values ​​exceeding 100 million yuan. Even if compared with other domestic machinery industries, there is a great deal of both equipment and technology. Differences, there are very few units that have the ability to independently research and develop high-end products. Therefore, in major projects such as large-scale petrochemical, nuclear power, and long-distance oil and gas transmission pipelines, the valves for the 300X700X pump control valves are still mainly imported.

According to incomplete statistics, the output value of the valve is the sum of the fan compressor and the pump and accounts for about 5% of the total output of the machinery industry. At the same time, as an important part of technical equipment, especially in the petrochemical, electric power, metallurgy, petrochemical, urban water supply and drainage systems, the valve plays a very key role, and the amount is very large. At present, there are about 6,000 valve companies in China, of which more than 900 have an annual output value of over 5 million yuan.

From our last century's "ten valves and nine leaks" to the current export of many products abroad, China's valve industry has made great progress. However, according to the data from the valve branch of the China General Machinery Industry Association, in China, the turnover of valves is as high as 50 billion yuan each year, but more than 10 billion yuan of valves are occupied by foreign valve companies. If you want to change this situation, you have to improve. Valve quality innovation technology is the key to the key.

When talking about the current status of China's valve industry, although there are many enterprises engaged in valve production in China, most of them are small and medium enterprises. A small number of small businesses have neither technology nor drawings, nor do they have professional technicians. The products do not conform to national standards and even produce counterfeit and shoddy products, seriously disrupting the valve market. Many large state-owned enterprises are faced with the problems of financial difficulties, outdated technology, and heavy burden, and they have no strength to invest in new projects and technological transformation. The valve technology may differ from that of the international market by about 10 years. For example, some products with strong corrosion resistance and high temperature and high pressure cannot be produced. The valves used in offshore oil extraction do not leak for 10-15 years, and we basically do not meet the requirements. Long-distance pipeline main lines also use foreign valves, and domestic valves can only be used on branch lines.

There are 12 factory-run research institutes in China, 2 professional research institutes, about 6,000 researchers engaged in product development and valve research, a department-level testing center and two sub-centers, capable of performing general-purpose valves, general-purpose valves, and steam traps. The performance test, but lack of dynamic simulation test means for test equipment, high performance parameters and high temperature parameters. The number of scientific research institutions in the valve industry is relatively small, and the capacity for scientific research and development is weak. The number of scientific research personnel is less than 10% of the number of employees. At present, some of them can only rely on some prototypes and structures from abroad to carry out some absorption and digestion work. There are also few real product development efforts.

As I have been through the development of the valve industry, the variety of valves is also increasing. There are more and more industries that apply valves, such as the petrochemical industry, the oil refining industry, the nuclear power industry, and the thermal power industry. And more and more applications in the industry also have more new requirements for the valve, and the quality and technical requirements for the valve are also getting higher and higher. The following standard will take you to look at the development prospects of the valve in various industries. Petrochemical industry: The competition in the petrochemical industry has always been fierce. The requirements for valve equipment are also the most stringent. The future valves will cooperate with industry automation to promote the overall level of valve equipment and develop multifunctional, high-efficiency and low-consumption petrochemical valve equipment. Annual output value of China's petrochemical enterprises is in the hundreds of billions, which shows that China has a large valve market, we should consider from the perspective of market changes, to ensure stability and development.

From the perspective of the current status of the valve industry in terms of foreign technology, a series of new prototypes and complete sets of equipment have emerged in foreign countries over the past decades. The accompanying valves have also manifested themselves as automation, large-scale, complete sets, and high-parameterization, and new varieties have also been developed. Increasingly. Such as fire dampers, emergency shut-off valves, water-cooled valves, and quick shut-off valves, the basic parameters of the valve have been greatly improved. Another example is the gate valve temperature of 1200 °C, the maximum diameter of 4200mm, pressure 70Mpa ~ 105Mpa, ball valve 3050mm. And foreign valve products, seal reliable variety, long life, good performance. Such as cast iron valve switch 30,000 times, reliable operation, rapid switching. The ball valve can reach more than 100,000 times without leakage.

In contrast, China's valve industry technology is relatively backward, the current level of domestic valve industry technology is only equivalent to the level of foreign early 90s. The complete set of low level, such as the current can only meet the 200,000 to 300,000 kW thermal power station and 450,000 t/a ethylene unit supporting valve. Valve products are mainly concentrated in the low-end market, and the research and development level of high-end products is not high. The 600,000 kW valves used in thermal power stations and 700,000 t/a or even 1 million t/a valves for ethylene devices still need to be imported from abroad.

Although there are still differences between the 500X pressure relief valve and the international advanced level, the current valve companies attach great importance to the development of new products. It should be seen that the country’s valve industry has developed to this day. But it has transcended the stage of simple absorption and absorption. To seek further development of technological approaches, we should analyze and consider the advanced products of foreign countries, analyze the trends of valve technology development and the direction of product development from a deeper level, and strive to develop 100X piston remote control float valves with autonomy. New products for intellectual property.